124672221 has 6 divisors (see below), whose sum is σ = 180082110. Its totient is φ = 83114808.

The previous prime is 124672211. The next prime is 124672231. The reversal of 124672221 is 122276421.

It is an interprime number because it is at equal distance from previous prime (124672211) and next prime (124672231).

It can be written as a sum of positive squares in only one way, i.e., 120692196 + 3980025 = 10986^2 + 1995^2 .

It is not a de Polignac number, because 124672221 - 2⁶ = 124672157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124672201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6926226 + ... + 6926243.

It is an arithmetic number, because the mean of its divisors is an integer number (30013685).

Almost surely, 2^124672221 is an apocalyptic number.

It is an amenable number.

124672221 is a deficient number, since it is larger than the sum of its proper divisors (55409889).

124672221 is a wasteful number, since it uses less digits than its factorization.

124672221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13852475 (or 13852472 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 124672221 is about 11165.6715427242. The cubic root of 124672221 is about 499.5625787703.

The spelling of 124672221 in words is "one hundred twenty-four million, six hundred seventy-two thousand, two hundred twenty-one".